JPS5932869Y2 - Heat exchanger - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a heat exchanger equipped with thin plate-shaped heat transfer fins.

An example of this type of heat exchanger is the automobile radiator shown in FIG. Liquid pipes 2, 2 through which the fluid to be heat exchanged flows through each fin 1
. . . are inserted, and an upper tank 3 and a lower tank 4 are connected to the upper and lower ends of each liquid pipe 2, and members 5.5 are fixed to both sides of both tanks 3 and 4.

The fixing of the liquid pipe 2 to the fin 1 is as follows: First, as shown in FIG. This is done by inserting a small-diameter liquid tube 2, expanding the liquid tube 2 with an expander 8, and bringing it into pressure contact with the opening 6, as shown in FIG. 2B.

However, when the liquid pipe 2 is expanded by the expander 8, the vertical wall 7 of the expanded liquid pipe 2 fits into the opening 6 of the adjacent liquid pipe 2, crushing the adjacent vertical wall 7, and the fin There is a possibility that the distance cannot be maintained.

Therefore, as shown in FIGS. 3A and 3B, apertures 6 are arranged in both the direction of flow of the heat exchange fluid and the direction perpendicular to the direction of flow, that is, in both the vertical and horizontal directions in the drawing.
A plurality of protrusions 9, 9, . I try to keep it that way.

- The protrusion 9 has a base piece that follows the air flow (arrow), and due to the presence of this protrusion 9, the liquid tube 2 is expanded by the expander 8, as shown in Fig. 4. However, the distance between the fins 1 does not change, and a good ventilation condition can be expected between each fin 1.

However, the protrusion 9 acts as a flow resistance for air, which is a heat exchange fluid, and the air resistance differs by about 15% between the presence and absence of the protrusion 9, and the heat exchange efficiency decreases when the protrusion 9 is present. Ta.

In view of these points, the present invention has been made with the purpose of providing a heat exchanger such as a radiator in which the air resistance of the protrusions is reduced. The parts are positioned between every other opening aligned in the flow direction, and are arranged so as to surround the opening in a staggered manner on the fin surface.

The present invention will be explained below with reference to an embodiment shown in FIG.

In Fig. 5, the fin 1 has two rows of openings 6°6...
... extend in the longitudinal direction of the fin 1, and a protrusion 9 is provided at an intermediate position between the adjacent opening 6 in this direction.
a, 9a, . . . are provided protrudingly.

The protrusion 9a is closer to the edge of the fin 1 than the opening 6.

On the other hand, a pair of openings 6 in the air flow direction indicated by arrows
, 6 are provided with projections 9b, 9b, . . . , respectively, and each opening 6 has three projections 9a, 9b, 9, respectively.
C, and the distance between the fins 1 can be stably maintained.

Note that each of the protrusions 9a to 9c is formed with a notch in the air flow direction, as in the conventional one.

According to the above-mentioned configuration, there is no substantial air flow between the pair of openings 6, 6 in the air flow direction, and only air leakage occurs there, so there is no substantial air flow between the pair of openings 6, 6 in the air flow direction. By providing the protrusion 9b, the air resistance is reduced, and the air resistance is reduced by 10% compared to the conventional one shown in FIG.

In addition, although the above-mentioned embodiment was explained about a radiator for an automobile, the present invention is applicable not only to this but also to an air conditioner and the like.

As explained above, in the heat exchanger according to the present invention, the protrusions aligned in the flow direction of the heat exchange fluid are positioned between every other openings aligned in the flow direction, and the protrusions are arranged in a zigzag shape on the fin surface. Since they are arranged in such a way as to surround the openings, the resistance of the heat exchange fluid due to the protrusions can be reduced, and excellent effects can be achieved in that efficient heat dissipation can be expected due to good circulation.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing a general automobile radiator, Fig. 2 A and B are explanatory diagrams showing the state in which the liquid pipe is fixed to the fin,
Figure 3A is a plan view showing the main parts of a conventional heat exchanger, Figure 3B is a perspective view of Figure 3A, and Figure 4 is the fin of the liquid pipe in the heat exchanger of Figures 3A and B. FIG. 5 is a plan view showing the main parts of the embodiment of the heat exchanger according to the present invention. 1...Heat transfer fin, 2...Liquid pipe, 3
... Upper tank, 4 ... Lower tank, 5 ... Member, 6 ... Hole, 9
a-c...Protrusion.

Claims (1)

[Scope of utility model registration request] 1. A large number of thin plate-shaped heat transfer fins are stacked one on top of the other at intervals, and each of these fins has a plurality of holes aligned in both the flow direction of the heat exchange fluid and the direction perpendicular to the flow direction. Further, liquid pipes through which the heat exchange fluid flows are inserted into each of these openings, and each of these fins is provided with a plurality of protrusions for maintaining the distance from the adjacent fin. In a heat exchanger, the protrusions aligned in the flow direction are provided in a middle part of the opening in a direction perpendicular to the flow direction, and are aligned in the flow direction and in a direction perpendicular to the flow direction. are positioned between the openings arranged in the flow direction every other time, and are arranged so as to surround the openings in a zigzag pattern on the fin surface. 2. The heat exchanger according to claim 1, wherein the protrusion has a cutout in the direction of flow of the heat exchange fluid.